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tegrakernel/kernel/kernel-4.9/drivers/power/supply/bq2419x-charger.c

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/*
* bq2419x-charger.c -- BQ24190/BQ24192/BQ24192i/BQ24193 Charger driver
*
* Copyright (c) 2013-2017, NVIDIA CORPORATION. All rights reserved.
*
* Author: Laxman Dewangan <ldewangan@nvidia.com>
* Author: Syed Rafiuddin <srafiuddin@nvidia.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation version 2.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
* whether express or implied; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307, USA
*/
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kthread.h>
#include <linux/sched.h>
#include <linux/sched/rt.h>
#include <linux/time.h>
#include <linux/timer.h>
#include <linux/gpio.h>
#include <linux/of_gpio.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/power/bq2419x-charger.h>
#include <linux/regmap.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/slab.h>
#include <linux/thermal.h>
#include <linux/alarmtimer.h>
#include <linux/power/battery-charger-gauge-comm.h>
#include <linux/workqueue.h>
#include <linux/extcon.h>
#define MAX_STR_PRINT 50
#define bq_chg_err(bq, fmt, ...) \
dev_err(bq->dev, "Charging Fault: " fmt, ##__VA_ARGS__)
#define BQ2419X_INPUT_VINDPM_OFFSET 3880
#define BQ2419X_CHARGE_ICHG_OFFSET 512
#define BQ2419X_PRE_CHG_IPRECHG_OFFSET 128
#define BQ2419X_PRE_CHG_TERM_OFFSET 128
#define BQ2419X_CHARGE_VOLTAGE_OFFSET 3504
#define BQ2419x_OTG_ENABLE_TIME msecs_to_jiffies(30000)
#define BQ2419X_PC_USB_LP0_THRESHOLD 95
#define BQ2419x_TEMP_H_CHG_DISABLE 50
#define BQ2419x_TEMP_L_CHG_DISABLE 0
/* input current limit */
static const unsigned int iinlim[] = {
100, 150, 500, 900, 1200, 1500, 2000, 3000,
};
static const struct regmap_config bq2419x_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = BQ2419X_MAX_REGS,
};
struct bq2419x_reg_info {
u8 mask;
u8 val;
};
static const unsigned int bq2419x_extcon_cable[] = {
EXTCON_USB,
EXTCON_NONE,
};
struct bq2419x_chip {
struct device *dev;
struct regmap *regmap;
int irq;
int gpio_otg_iusb;
int auto_rechg_power_on_time;
bool emulate_input_disconnected;
struct mutex mutex;
struct mutex otg_mutex;
int in_current_limit;
struct regulator_dev *chg_rdev;
struct regulator_desc chg_reg_desc;
struct regulator_init_data *chg_ridata;
struct device_node *chg_np;
struct regulator_dev *vbus_rdev;
struct regulator_desc vbus_reg_desc;
struct regulator_init_data *vbus_ridata;
struct device_node *vbus_np;
struct battery_charger_dev *bc_dev;
int chg_status;
struct delayed_work otg_reset_work;
struct delayed_work wdt_restart_wq;
int is_otg_connected;
int battery_presense;
bool cable_connected;
int last_charging_current;
bool disable_suspend_during_charging;
bool wake_lock_released;
int last_temp;
bool shutdown_complete;
bool charging_disabled_on_suspend;
bool thermal_chg_disable;
struct bq2419x_reg_info input_src;
struct bq2419x_reg_info chg_current_control;
struct bq2419x_reg_info prechg_term_control;
struct bq2419x_reg_info ir_comp_therm;
struct bq2419x_reg_info chg_voltage_control;
struct bq2419x_reg_info watchdog_timer;
struct bq2419x_vbus_platform_data *vbus_pdata;
struct bq2419x_charger_platform_data *charger_pdata;
struct delayed_work thermal_init_work;
struct thermal_zone_device *die_tz_device;
int thermal_init_retry;
struct extcon_dev edev;
const char *ext_name;
int last_input_voltage;
int wdt_refresh_timeout;
int wdt_time_sec;
};
static int current_to_reg(const unsigned int *tbl,
size_t size, unsigned int val)
{
size_t i;
for (i = 0; i < size; i++)
if (val < tbl[i])
break;
return i > 0 ? i - 1 : -EINVAL;
}
static int bq2419x_charger_enable(struct bq2419x_chip *bq2419x)
{
int ret;
if (bq2419x->battery_presense) {
dev_info(bq2419x->dev, "Charging enabled\n");
/* set default Charge regulation voltage */
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_VOLT_CTRL_REG,
bq2419x->chg_voltage_control.mask,
bq2419x->chg_voltage_control.val);
if (ret < 0) {
dev_err(bq2419x->dev,
"VOLT_CTRL_REG update failed %d\n", ret);
return ret;
}
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_PWR_ON_REG,
BQ2419X_ENABLE_CHARGE_MASK,
BQ2419X_ENABLE_CHARGE);
} else {
dev_info(bq2419x->dev, "Charging disabled\n");
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_PWR_ON_REG,
BQ2419X_ENABLE_CHARGE_MASK,
BQ2419X_DISABLE_CHARGE);
}
if (ret < 0)
dev_err(bq2419x->dev, "register update failed, err %d\n", ret);
return ret;
}
static int bq2419x_reset_wdt(struct bq2419x_chip *bq2419x, const char *from)
{
int ret = 0;
unsigned int reg_val;
int timeout;
if (!bq2419x->wdt_refresh_timeout)
return -EINVAL;
dev_info(bq2419x->dev, "%s() from %s()\n", __func__, from);
ret = regmap_read(bq2419x->regmap, BQ2419X_PWR_ON_REG, &reg_val);
if (ret < 0) {
dev_err(bq2419x->dev, "PWR_ON_REG read failed: %d\n", ret);
goto scrub;
}
reg_val |= BIT(6);
/* Write two times to make sure reset WDT */
ret = regmap_write(bq2419x->regmap, BQ2419X_PWR_ON_REG, reg_val);
if (ret < 0) {
dev_err(bq2419x->dev, "PWR_ON_REG write failed: %d\n", ret);
goto scrub;
}
ret = regmap_write(bq2419x->regmap, BQ2419X_PWR_ON_REG, reg_val);
if (ret < 0) {
dev_err(bq2419x->dev, "PWR_ON_REG write failed: %d\n", ret);
goto scrub;
}
scrub:
timeout = bq2419x->wdt_refresh_timeout;
schedule_delayed_work(&bq2419x->wdt_restart_wq,
msecs_to_jiffies(timeout * 1000));
return ret;
}
static int bq2419x_watchdog_disable(struct bq2419x_chip *bq2419x)
{
int ret;
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_TIME_CTRL_REG,
BQ2419X_WD_MASK, 0);
if (ret < 0)
dev_err(bq2419x->dev, "TIME_CTRL_REG read failed: %d\n",
ret);
else
dev_info(bq2419x->dev, "Charging WATCHDOG timer disabled\n");
return ret;
}
static int bq2419x_watchdog_enable(struct bq2419x_chip *bq2419x,
const char *from)
{
int ret = 0;
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_TIME_CTRL_REG,
bq2419x->watchdog_timer.mask,
bq2419x->watchdog_timer.val);
if (ret < 0) {
dev_err(bq2419x->dev, "TIME_CTRL_REG read failed: %d\n", ret);
return ret;
}
ret = bq2419x_reset_wdt(bq2419x, from);
if (ret < 0) {
dev_err(bq2419x->dev, "bq2419x_reset_wdt failed: %d\n", ret);
return ret;
}
dev_info(bq2419x->dev, "Charger Watchdog timer enabled in OTG mode\n");
return ret;
}
static void bq2419x_wdt_restart_wq(struct work_struct *work)
{
struct bq2419x_chip *bq2419x;
int ret;
bq2419x = container_of(work, struct bq2419x_chip, wdt_restart_wq.work);
ret = bq2419x_reset_wdt(bq2419x, "Thread");
if (ret < 0)
dev_err(bq2419x->dev, "bq2419x_reset_wdt failed: %d\n", ret);
}
static int bq2419x_vbus_enable(struct regulator_dev *rdev)
{
struct bq2419x_chip *bq2419x = rdev_get_drvdata(rdev);
int ret;
dev_info(bq2419x->dev, "VBUS enabled, charging disabled\n");
mutex_lock(&bq2419x->otg_mutex);
bq2419x->is_otg_connected = true;
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_PWR_ON_REG,
BQ2419X_ENABLE_CHARGE_MASK, BQ2419X_ENABLE_VBUS);
if (ret < 0)
dev_err(bq2419x->dev, "PWR_ON_REG update failed %d", ret);
if (bq2419x->wdt_refresh_timeout)
bq2419x_watchdog_enable(bq2419x, "OTG-ENABLE");
mutex_unlock(&bq2419x->otg_mutex);
return ret;
}
static int bq2419x_vbus_disable(struct regulator_dev *rdev)
{
struct bq2419x_chip *bq2419x = rdev_get_drvdata(rdev);
int ret;
dev_info(bq2419x->dev, "VBUS disabled, charging enabled\n");
mutex_lock(&bq2419x->otg_mutex);
if (bq2419x->wdt_refresh_timeout) {
cancel_delayed_work_sync(&bq2419x->wdt_restart_wq);
bq2419x_watchdog_disable(bq2419x);
}
bq2419x->is_otg_connected = false;
ret = bq2419x_charger_enable(bq2419x);
if (ret < 0)
dev_err(bq2419x->dev, "Charger enable failed %d", ret);
mutex_unlock(&bq2419x->otg_mutex);
return ret;
}
static int bq2419x_vbus_is_enabled(struct regulator_dev *rdev)
{
struct bq2419x_chip *bq2419x = rdev_get_drvdata(rdev);
int ret;
unsigned int data;
ret = regmap_read(bq2419x->regmap, BQ2419X_PWR_ON_REG, &data);
if (ret < 0) {
dev_err(bq2419x->dev, "PWR_ON_REG read failed %d", ret);
return ret;
}
return (data & BQ2419X_ENABLE_CHARGE_MASK) == BQ2419X_ENABLE_VBUS;
}
static struct regulator_ops bq2419x_vbus_ops = {
.enable = bq2419x_vbus_enable,
.disable = bq2419x_vbus_disable,
.is_enabled = bq2419x_vbus_is_enabled,
};
static int bq2419x_val_to_reg(int val, int offset, int div, int nbits,
bool roundup)
{
int max_val = offset + (BIT(nbits) - 1) * div;
if (val <= offset)
return 0;
if (val >= max_val)
return BIT(nbits) - 1;
if (roundup)
return DIV_ROUND_UP(val - offset, div);
else
return (val - offset) / div;
}
static int bq2419x_process_charger_plat_data(struct bq2419x_chip *bq2419x,
struct bq2419x_charger_platform_data *chg_pdata)
{
int voltage_input;
int fast_charge_current;
int pre_charge_current;
int termination_current;
int ir_compensation_resistor;
int ir_compensation_voltage;
int thermal_regulation_threshold;
int charge_voltage_limit;
int vindpm, ichg, iprechg, iterm, bat_comp, vclamp, treg, vreg, wtreg;
if (chg_pdata) {
voltage_input = chg_pdata->input_voltage_limit_mV ?: 4200;
fast_charge_current =
chg_pdata->fast_charge_current_limit_mA ?: 4544;
pre_charge_current =
chg_pdata->pre_charge_current_limit_mA ?: 256;
termination_current =
chg_pdata->termination_current_limit_mA ?: 128;
ir_compensation_resistor =
chg_pdata->ir_compensation_resister_ohm ?: 70;
ir_compensation_voltage =
chg_pdata->ir_compensation_voltage_mV ?: 112;
thermal_regulation_threshold =
chg_pdata->thermal_regulation_threshold_degC ?: 100;
charge_voltage_limit =
chg_pdata->charge_voltage_limit_mV ?: 4208;
} else {
voltage_input = 4200;
fast_charge_current = 4544;
pre_charge_current = 256;
termination_current = 128;
ir_compensation_resistor = 70;
ir_compensation_voltage = 112;
thermal_regulation_threshold = 100;
charge_voltage_limit = 4208;
}
vindpm = bq2419x_val_to_reg(voltage_input,
BQ2419X_INPUT_VINDPM_OFFSET, 80, 4, 0);
bq2419x->input_src.mask = BQ2419X_INPUT_VINDPM_MASK;
bq2419x->input_src.val = vindpm << 3;
bq2419x->input_src.mask |= BQ2419X_INPUT_IINLIM_MASK;
bq2419x->input_src.val |= 0x2;
ichg = bq2419x_val_to_reg(fast_charge_current,
BQ2419X_CHARGE_ICHG_OFFSET, 64, 6, 0);
bq2419x->chg_current_control.mask = BQ2419X_CHRG_CTRL_ICHG_MASK;
bq2419x->chg_current_control.val = ichg << 2;
iprechg = bq2419x_val_to_reg(pre_charge_current,
BQ2419X_PRE_CHG_IPRECHG_OFFSET, 128, 4, 0);
bq2419x->prechg_term_control.mask = BQ2419X_CHRG_TERM_PRECHG_MASK;
bq2419x->prechg_term_control.val = iprechg << 4;
iterm = bq2419x_val_to_reg(termination_current,
BQ2419X_PRE_CHG_TERM_OFFSET, 128, 4, 0);
bq2419x->prechg_term_control.mask |= BQ2419X_CHRG_TERM_TERM_MASK;
bq2419x->prechg_term_control.val |= iterm;
bat_comp = ir_compensation_resistor / 10;
bq2419x->ir_comp_therm.mask = BQ2419X_THERM_BAT_COMP_MASK;
bq2419x->ir_comp_therm.val = bat_comp << 5;
vclamp = ir_compensation_voltage / 16;
bq2419x->ir_comp_therm.mask |= BQ2419X_THERM_VCLAMP_MASK;
bq2419x->ir_comp_therm.val |= vclamp << 2;
bq2419x->ir_comp_therm.mask |= BQ2419X_THERM_TREG_MASK;
if (thermal_regulation_threshold <= 60)
treg = 0;
else if (thermal_regulation_threshold <= 80)
treg = 1;
else if (thermal_regulation_threshold <= 100)
treg = 2;
else
treg = 3;
bq2419x->ir_comp_therm.val |= treg;
vreg = bq2419x_val_to_reg(charge_voltage_limit,
BQ2419X_CHARGE_VOLTAGE_OFFSET, 16, 6, 1);
bq2419x->chg_voltage_control.mask = BQ2419X_CHG_VOLT_LIMIT_MASK;
bq2419x->chg_voltage_control.val = vreg << 2;
if (!bq2419x->wdt_time_sec)
goto done;
bq2419x->watchdog_timer.mask = BQ2419X_WD_MASK;
if (bq2419x->wdt_time_sec <= 60) {
wtreg = BQ2419X_WD_40ms;
bq2419x->wdt_refresh_timeout = 25;
} else if (bq2419x->wdt_time_sec <= 120) {
wtreg = BQ2419X_WD_80ms;
bq2419x->wdt_refresh_timeout = 50;
} else {
wtreg = BQ2419X_WD_160ms;
bq2419x->wdt_refresh_timeout = 125;
}
bq2419x->watchdog_timer.val |= wtreg;
done:
return 0;
}
static int bq2419x_safetytimer_disable(struct bq2419x_chip *bq2419x)
{
int ret;
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_TIME_CTRL_REG,
BQ2419X_EN_SFT_TIMER_MASK, 0);
if (ret < 0)
dev_err(bq2419x->dev, "TIME_CTRL update failed: %d\n", ret);
else
dev_info(bq2419x->dev, "Charging SAFETY timer disabled\n");
return ret;
}
static int bq2419x_charger_init(struct bq2419x_chip *bq2419x)
{
int ret;
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_CHRG_CTRL_REG,
bq2419x->chg_current_control.mask,
bq2419x->chg_current_control.val);
if (ret < 0) {
dev_err(bq2419x->dev, "CHRG_CTRL_REG write failed %d\n", ret);
return ret;
}
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_CHRG_TERM_REG,
bq2419x->prechg_term_control.mask,
bq2419x->prechg_term_control.val);
if (ret < 0) {
dev_err(bq2419x->dev, "CHRG_TERM_REG write failed %d\n", ret);
return ret;
}
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_INPUT_SRC_REG,
bq2419x->input_src.mask, bq2419x->input_src.val);
if (ret < 0)
dev_err(bq2419x->dev, "INPUT_SRC_REG write failed %d\n", ret);
bq2419x->last_input_voltage = (bq2419x->input_src.val >> 3) & 0xF;
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_THERM_REG,
bq2419x->ir_comp_therm.mask, bq2419x->ir_comp_therm.val);
if (ret < 0)
dev_err(bq2419x->dev, "THERM_REG write failed: %d\n", ret);
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_VOLT_CTRL_REG,
bq2419x->chg_voltage_control.mask,
bq2419x->chg_voltage_control.val);
if (ret < 0)
dev_err(bq2419x->dev, "VOLT_CTRL update failed: %d\n", ret);
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_TIME_CTRL_REG,
BQ2419X_TIME_JEITA_ISET | BQ2419x_EN_CHARGE_TERM, 0);
if (ret < 0)
dev_err(bq2419x->dev, "TIME_CTRL update failed: %d\n", ret);
/* disable safety timer */
bq2419x_safetytimer_disable(bq2419x);
/* disable sWDT timer */
if (!bq2419x->is_otg_connected)
ret = bq2419x_watchdog_disable(bq2419x);
return ret;
}
static void bq2419x_otg_reset_work_handler(struct work_struct *work)
{
int ret;
struct bq2419x_chip *bq2419x = container_of(to_delayed_work(work),
struct bq2419x_chip, otg_reset_work);
if (!mutex_is_locked(&bq2419x->otg_mutex)) {
mutex_lock(&bq2419x->otg_mutex);
if (bq2419x->is_otg_connected) {
ret = regmap_update_bits(bq2419x->regmap,
BQ2419X_PWR_ON_REG,
BQ2419X_ENABLE_CHARGE_MASK,
BQ2419X_ENABLE_VBUS);
if (ret < 0)
dev_err(bq2419x->dev,
"PWR_ON_REG update failed %d", ret);
}
if (bq2419x->wdt_refresh_timeout)
bq2419x_watchdog_enable(bq2419x, "OTG-RESET-WORK");
mutex_unlock(&bq2419x->otg_mutex);
}
}
static int bq2419x_disable_otg_mode(struct bq2419x_chip *bq2419x)
{
int ret = 0;
mutex_lock(&bq2419x->otg_mutex);
if (bq2419x->is_otg_connected) {
if (bq2419x->wdt_refresh_timeout) {
cancel_delayed_work_sync(&bq2419x->wdt_restart_wq);
bq2419x_watchdog_disable(bq2419x);
}
ret = bq2419x_charger_enable(bq2419x);
if (ret < 0) {
dev_err(bq2419x->dev,
"Charger enable failed %d", ret);
mutex_unlock(&bq2419x->otg_mutex);
return ret;
}
schedule_delayed_work(&bq2419x->otg_reset_work,
BQ2419x_OTG_ENABLE_TIME);
}
mutex_unlock(&bq2419x->otg_mutex);
return ret;
}
static int bq2419x_charger_input_voltage_configure(
struct battery_charger_dev *bc_dev, int battery_soc)
{
struct bq2419x_chip *bq2419x = battery_charger_get_drvdata(bc_dev);
struct bq2419x_charger_platform_data *chg_pdata;
u32 input_voltage_limit = 0;
int ret;
int i;
int vreg;
chg_pdata = bq2419x->charger_pdata;
if (!bq2419x->cable_connected || !chg_pdata->n_soc_profile)
return 0;
for (i = 0; i < chg_pdata->n_soc_profile; ++i) {
if (battery_soc < chg_pdata->soc_range[i]) {
if (chg_pdata->input_voltage_soc_limit)
input_voltage_limit =
chg_pdata->input_voltage_soc_limit[i];
break;
}
}
if (!input_voltage_limit)
return 0;
/*Configure input voltage limit */
vreg = bq2419x_val_to_reg(input_voltage_limit,
BQ2419X_INPUT_VINDPM_OFFSET, 80, 4, 0);
if (bq2419x->last_input_voltage == vreg)
return 0;
dev_info(bq2419x->dev, "Changing VINDPM to soc:voltage:vreg %d:%d:%d\n",
battery_soc, input_voltage_limit, vreg);
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_INPUT_SRC_REG,
BQ2419X_INPUT_VINDPM_MASK,
(vreg << 3));
if (ret < 0) {
dev_err(bq2419x->dev, "INPUT_VOLTAGE update failed %d\n", ret);
return ret;
}
bq2419x->last_input_voltage = vreg;
return 0;
}
static int bq2419x_configure_charging_current(struct bq2419x_chip *bq2419x,
int in_current_limit)
{
int val = 0;
int ret = 0;
int floor = 0;
int battery_soc = 0;
/* Clear EN_HIZ */
if (!bq2419x->emulate_input_disconnected) {
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_INPUT_SRC_REG,
BQ2419X_EN_HIZ, 0);
if (ret < 0) {
dev_err(bq2419x->dev,
"INPUT_SRC_REG update failed %d\n", ret);
return ret;
}
}
/* Configure input voltage limit*/
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_INPUT_SRC_REG,
bq2419x->input_src.mask, bq2419x->input_src.val);
if (ret < 0) {
dev_err(bq2419x->dev, "INPUT_SRC_REG update failed %d\n", ret);
return ret;
}
bq2419x->last_input_voltage = (bq2419x->input_src.val >> 3) & 0xF;
/* Configure input current limit in steps */
val = current_to_reg(iinlim, ARRAY_SIZE(iinlim), in_current_limit);
floor = current_to_reg(iinlim, ARRAY_SIZE(iinlim), 500);
if (val < 0 || floor < 0)
return 0;
for (; floor <= val; floor++) {
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_INPUT_SRC_REG,
BQ2419x_CONFIG_MASK, floor);
if (ret < 0)
dev_err(bq2419x->dev,
"INPUT_SRC_REG update failed: %d\n", ret);
udelay(BQ2419x_CHARGING_CURRENT_STEP_DELAY_US);
}
bq2419x->in_current_limit = in_current_limit;
if (bq2419x->charger_pdata->n_soc_profile) {
battery_soc = battery_gauge_get_battery_soc(bq2419x->bc_dev);
if (battery_soc > 0)
bq2419x_charger_input_voltage_configure(
bq2419x->bc_dev, battery_soc);
}
return ret;
}
static int bq2419x_set_charging_current(struct regulator_dev *rdev,
int min_uA, int max_uA)
{
struct bq2419x_chip *bq2419x = rdev_get_drvdata(rdev);
int in_current_limit;
int old_current_limit;
int ret = 0;
int val;
dev_info(bq2419x->dev, "Setting charging current %d\n", max_uA/1000);
bq2419x->chg_status = BATTERY_DISCHARGING;
if (!bq2419x->is_otg_connected) {
ret = bq2419x_charger_enable(bq2419x);
if (ret < 0) {
dev_err(bq2419x->dev, "Charger enable failed %d", ret);
return ret;
}
}
ret = regmap_read(bq2419x->regmap, BQ2419X_SYS_STAT_REG, &val);
if (ret < 0)
dev_err(bq2419x->dev, "SYS_STAT_REG read failed: %d\n", ret);
if (max_uA == 0 && val != 0)
return ret;
if (!max_uA)
bq2419x->wake_lock_released = false;
old_current_limit = bq2419x->in_current_limit;
bq2419x->last_charging_current = max_uA;
if ((val & BQ2419x_VBUS_STAT) == BQ2419x_VBUS_UNKNOWN) {
in_current_limit = 500;
bq2419x->cable_connected = 0;
bq2419x->chg_status = BATTERY_DISCHARGING;
battery_charger_thermal_stop_monitoring(
bq2419x->bc_dev);
/* Clear JEITA_VSET bit if cable disconnected */
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_MISC_OPER_REG,
BQ2419X_JEITA_VSET_MASK, 0);
if (ret < 0)
dev_err(bq2419x->dev, "JEITA_VSET update failed: %d\n",
ret);
} else if ((val & BQ2419x_CHRG_STATE_MASK) ==
BQ2419x_CHRG_STATE_CHARGE_DONE) {
dev_dbg(bq2419x->dev, "Charging completed\n");
bq2419x->chg_status = BATTERY_CHARGING_DONE;
bq2419x->cable_connected = 1;
in_current_limit = max_uA/1000;
battery_charger_thermal_stop_monitoring(
bq2419x->bc_dev);
} else {
in_current_limit = max_uA/1000;
bq2419x->cable_connected = 1;
bq2419x->chg_status = BATTERY_CHARGING;
battery_charger_thermal_start_monitoring(
bq2419x->bc_dev);
/* Set JEITA_VSET bit if charger cable connected */
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_MISC_OPER_REG,
BQ2419X_JEITA_VSET_MASK, BQ2419X_JEITA_VSET_42V);
if (ret < 0)
dev_err(bq2419x->dev, "JEITA_VSET update failed: %d\n",
ret);
}
if (bq2419x->wake_lock_released)
in_current_limit = 500;
ret = bq2419x_configure_charging_current(bq2419x, in_current_limit);
if (ret < 0)
goto error;
battery_charging_status_update(bq2419x->bc_dev, bq2419x->chg_status);
if (bq2419x->disable_suspend_during_charging) {
if (bq2419x->cable_connected && in_current_limit > 500
&& (bq2419x->chg_status != BATTERY_CHARGING_DONE))
battery_charger_acquire_wake_lock(bq2419x->bc_dev);
else if (!bq2419x->cable_connected && old_current_limit > 500)
battery_charger_release_wake_lock(bq2419x->bc_dev);
}
return 0;
error:
dev_err(bq2419x->dev, "Charger enable failed, err = %d\n", ret);
return ret;
}
static struct regulator_ops bq2419x_tegra_regulator_ops = {
.set_current_limit = bq2419x_set_charging_current,
};
static int bq2419x_set_charging_current_suspend(struct bq2419x_chip *bq2419x,
int in_current_limit)
{
int ret;
int val;
dev_info(bq2419x->dev, "Setting charging current %d mA\n",
in_current_limit);
if (!bq2419x->is_otg_connected) {
ret = bq2419x_charger_enable(bq2419x);
if (ret < 0) {
dev_err(bq2419x->dev, "Charger enable failed %d", ret);
return ret;
}
}
ret = regmap_read(bq2419x->regmap, BQ2419X_SYS_STAT_REG, &val);
if (ret < 0)
dev_err(bq2419x->dev, "SYS_STAT_REG read failed: %d\n", ret);
if (!bq2419x->cable_connected) {
ret = bq2419x_configure_charging_current(bq2419x,
in_current_limit);
if (ret < 0)
return ret;
}
return 0;
}
static int bq2419x_reconfigure_charger_param(struct bq2419x_chip *bq2419x,
const char *from)
{
int ret;
dev_info(bq2419x->dev, "Reconfiguring charging param from %s\n", from);
ret = bq2419x_charger_init(bq2419x);
if (ret < 0) {
dev_err(bq2419x->dev, "Charger init failed: %d\n", ret);
return ret;
}
ret = bq2419x_configure_charging_current(bq2419x,
bq2419x->in_current_limit);
if (ret < 0) {
dev_err(bq2419x->dev, "Current config failed: %d\n", ret);
return ret;
}
mutex_lock(&bq2419x->otg_mutex);
if (bq2419x->is_otg_connected) {
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_PWR_ON_REG,
BQ2419X_ENABLE_CHARGE_MASK,
BQ2419X_ENABLE_VBUS);
if (ret < 0)
dev_err(bq2419x->dev,
"PWR_ON_REG update failed %d", ret);
ret = bq2419x_watchdog_enable(bq2419x, from);
if (ret < 0)
dev_err(bq2419x->dev, "BQWDT enable failed %d\n", ret);
} else {
ret = bq2419x_watchdog_disable(bq2419x);
if (ret < 0)
dev_err(bq2419x->dev, "BQWDT enable failed %d\n", ret);
}
mutex_unlock(&bq2419x->otg_mutex);
return ret;
}
static int bq2419x_thermal_read_temp(void *data, int *temp)
{
struct bq2419x_chip *bq2419x = data;
unsigned int reg_06;
unsigned int reg_08;
int treg;
int ret;
long curr_temp;
ret = regmap_read(bq2419x->regmap, BQ2419X_THERM_REG, &reg_06);
if (ret < 0) {
dev_err(bq2419x->dev, "BQ2419X_THERM_REG rd failed %d\n", ret);
return ret;
}
ret = regmap_read(bq2419x->regmap, BQ2419X_SYS_STAT_REG, &reg_08);
if (ret < 0) {
dev_err(bq2419x->dev,
"BQ2419X_SYS_STAT_REG rd failed %d\n", ret);
return ret;
}
treg = reg_06 & BQ2419x_TREG;
curr_temp = (treg * 20 + 60) * 1000;
if (reg_08 & BQ2419x_THERM_STAT)
curr_temp += 5000;
else
curr_temp -= 5000;
*temp = curr_temp;
return 0;
}
#ifdef CONFIG_THERMAL
static struct thermal_zone_of_device_ops bq2419x_thermal_ops = {
.get_temp = bq2419x_thermal_read_temp,
};
static int bq2419x_thermal_check_therm_regulation(struct bq2419x_chip *bq2419x)
{
if (bq2419x->die_tz_device)
thermal_zone_device_update(bq2419x->die_tz_device,
THERMAL_EVENT_UNSPECIFIED);
return 0;
}
static void bq2419x_thermal_init_work(struct work_struct *work)
{
int ret;
struct bq2419x_chip *bq2419x = container_of(to_delayed_work(work),
struct bq2419x_chip, thermal_init_work);
struct thermal_zone_device *die_tz_device;
die_tz_device = devm_thermal_zone_of_sensor_register(bq2419x->dev,
0, bq2419x, &bq2419x_thermal_ops);
if (IS_ERR(die_tz_device)) {
ret = PTR_ERR(die_tz_device);
if ((ret == -EPROBE_DEFER) && (bq2419x->thermal_init_retry)) {
schedule_delayed_work(&bq2419x->thermal_init_work,
msecs_to_jiffies(1000));
bq2419x->thermal_init_retry--;
}
return;
}
bq2419x->die_tz_device = die_tz_device;
dev_info(bq2419x->dev, "Thermal Zone registration success\n");
}
#endif
static int bq2419x_fault_clear_sts(struct bq2419x_chip *bq2419x,
unsigned int *reg09_val)
{
int ret;
unsigned int reg09_1, reg09_2;
ret = regmap_read(bq2419x->regmap, BQ2419X_FAULT_REG, &reg09_1);
if (ret < 0) {
dev_err(bq2419x->dev, "FAULT_REG read failed: %d\n", ret);
return ret;
}
ret = regmap_read(bq2419x->regmap, BQ2419X_FAULT_REG, &reg09_2);
if (ret < 0)
dev_err(bq2419x->dev, "FAULT_REG read failed: %d\n", ret);
if (reg09_val) {
unsigned int reg09 = 0;
if ((reg09_1 | reg09_2) & BQ2419x_FAULT_WATCHDOG_FAULT)
reg09 |= BQ2419x_FAULT_WATCHDOG_FAULT;
if ((reg09_1 | reg09_2) & BQ2419x_FAULT_BOOST_FAULT)
reg09 |= BQ2419x_FAULT_BOOST_FAULT;
if ((reg09_1 | reg09_2) & BQ2419x_FAULT_BAT_FAULT)
reg09 |= BQ2419x_FAULT_BAT_FAULT;
if (((reg09_1 & BQ2419x_FAULT_CHRG_FAULT_MASK) ==
BQ2419x_FAULT_CHRG_SAFTY) ||
((reg09_2 & BQ2419x_FAULT_CHRG_FAULT_MASK) ==
BQ2419x_FAULT_CHRG_SAFTY))
reg09 |= BQ2419x_FAULT_CHRG_SAFTY;
else if (((reg09_2 & BQ2419x_FAULT_CHRG_FAULT_MASK) ==
BQ2419x_FAULT_CHRG_INPUT))
reg09 |= BQ2419x_FAULT_CHRG_INPUT;
else if (((reg09_1 & BQ2419x_FAULT_CHRG_FAULT_MASK) ==
BQ2419x_FAULT_CHRG_THERMAL) ||
((reg09_2 & BQ2419x_FAULT_CHRG_FAULT_MASK) ==
BQ2419x_FAULT_CHRG_THERMAL))
reg09 |= BQ2419x_FAULT_CHRG_THERMAL;
reg09 |= reg09_2 &BQ2419x_FAULT_NTC_FAULT;
*reg09_val = reg09;
}
return ret;
}
static int bq2419x_extcon_cable_update(struct bq2419x_chip *bq2419x,
unsigned int val)
{
if ((val & BQ2419x_VBUS_PG_STAT) == BQ2419x_PG_VBUS_USB) {
extcon_set_state(&bq2419x->edev, EXTCON_USB, true);
dev_dbg(bq2419x->dev, "USB is connected\n");
} else if ((val & BQ2419x_VBUS_PG_STAT) == BQ2419x_VBUS_UNKNOWN) {
extcon_set_state(&bq2419x->edev, EXTCON_USB, false);
dev_info(bq2419x->dev, "USB is disconnected\n");
}
return 0;
}
static irqreturn_t bq2419x_irq(int irq, void *data)
{
struct bq2419x_chip *bq2419x = data;
int ret;
unsigned int val;
int check_chg_state = 0;
mutex_lock(&bq2419x->mutex);
if (bq2419x->shutdown_complete)
goto out;
ret = bq2419x_fault_clear_sts(bq2419x, &val);
if (ret < 0) {
dev_err(bq2419x->dev, "fault clear status failed %d\n", ret);
goto out;
}
dev_dbg(bq2419x->dev, "%s() Irq %d status 0x%02x\n",
__func__, irq, val);
if (val & BQ2419x_FAULT_BOOST_FAULT) {
bq_chg_err(bq2419x, "VBUS Overloaded\n");
ret = bq2419x_disable_otg_mode(bq2419x);
if (ret < 0) {
bq_chg_err(bq2419x, "otg mode disable failed\n");
goto out;
}
regulator_notifier_call_chain(bq2419x->vbus_rdev,
REGULATOR_EVENT_OVER_CURRENT, NULL);
}
if (!bq2419x->battery_presense)
goto sys_stat_read;
if (val & BQ2419x_FAULT_WATCHDOG_FAULT) {
bq_chg_err(bq2419x, "Charger WatchDog Timer expired\n");
ret = bq2419x_reconfigure_charger_param(bq2419x,
"WDT-EXP-ISR");
if (ret < 0)
dev_err(bq2419x->dev, "BQ reconfig failed %d\n", ret);
}
switch (val & BQ2419x_FAULT_CHRG_FAULT_MASK) {
case BQ2419x_FAULT_CHRG_INPUT:
bq_chg_err(bq2419x,
"Input Fault (VBUS OVP or VBAT<VBUS<3.8V)\n");
break;
case BQ2419x_FAULT_CHRG_THERMAL:
bq_chg_err(bq2419x, "Thermal shutdown\n");
check_chg_state = 1;
ret = bq2419x_disable_otg_mode(bq2419x);
if (ret < 0) {
bq_chg_err(bq2419x, "otg mode disable failed\n");
goto out;
}
if (bq2419x->is_otg_connected)
regulator_notifier_call_chain(bq2419x->vbus_rdev,
REGULATOR_EVENT_OVER_TEMP, NULL);
break;
default:
break;
}
if (val & BQ2419x_FAULT_NTC_FAULT) {
bq_chg_err(bq2419x, "NTC fault %d\n",
val & BQ2419x_FAULT_NTC_FAULT);
check_chg_state = 1;
}
sys_stat_read:
ret = regmap_read(bq2419x->regmap, BQ2419X_SYS_STAT_REG, &val);
if (ret < 0) {
dev_err(bq2419x->dev, "SYS_STAT_REG read failed %d\n", ret);
goto out;
}
bq2419x_extcon_cable_update(bq2419x, val);
if (!bq2419x->battery_presense)
goto out;
#ifdef CONFIG_THERMAL
if (val & BQ2419x_THERM_STAT) {
dev_info(bq2419x->dev, "Charger in thermal regulation\n");
bq2419x_thermal_check_therm_regulation(bq2419x);
}
#endif
if ((val & BQ2419x_CHRG_STATE_MASK) == BQ2419x_CHRG_STATE_CHARGE_DONE) {
dev_dbg(bq2419x->dev, "Charging completed\n");
bq2419x->chg_status = BATTERY_CHARGING_DONE;
battery_charging_status_update(bq2419x->bc_dev,
bq2419x->chg_status);
if (bq2419x->disable_suspend_during_charging)
battery_charger_release_wake_lock(bq2419x->bc_dev);
battery_charger_thermal_stop_monitoring(
bq2419x->bc_dev);
}
if ((val & BQ2419x_VSYS_STAT_MASK) == BQ2419x_VSYS_STAT_BATT_LOW)
dev_info(bq2419x->dev,
"In VSYSMIN regulation, battery is too low\n");
/* Update Charging status based on STAT register */
if (check_chg_state &&
((val & BQ2419x_CHRG_STATE_MASK) == BQ2419x_CHRG_STATE_NOTCHARGING)) {
bq2419x->chg_status = BATTERY_DISCHARGING;
battery_charging_status_update(bq2419x->bc_dev,
bq2419x->chg_status);
if (bq2419x->disable_suspend_during_charging)
battery_charger_release_wake_lock(bq2419x->bc_dev);
}
out:
mutex_unlock(&bq2419x->mutex);
return IRQ_HANDLED;
}
static struct regulator_desc bq2419x_chg_reg_desc = {
.name = "bq2419x-charger",
.ops = &bq2419x_tegra_regulator_ops,
.type = REGULATOR_CURRENT,
.owner = THIS_MODULE,
};
static struct regulator_desc bq2419x_vbus_reg_desc = {
.name = "bq2419x-vbus",
.ops = &bq2419x_vbus_ops,
.type = REGULATOR_VOLTAGE,
.enable_time = 220000,
.owner = THIS_MODULE,
};
static int bq2419x_init_charger_regulator(struct bq2419x_chip *bq2419x,
struct bq2419x_platform_data *pdata)
{
int ret = 0;
struct regulator_config rconfig = { };
if (!pdata->bcharger_pdata) {
dev_err(bq2419x->dev, "No charger platform data\n");
return 0;
}
bq2419x->chg_reg_desc = bq2419x_chg_reg_desc;
bq2419x->chg_ridata = pdata->bcharger_pdata->ridata;
bq2419x->chg_ridata->driver_data = bq2419x;
bq2419x->chg_ridata->constraints.valid_modes_mask =
REGULATOR_MODE_NORMAL |
REGULATOR_MODE_STANDBY;
bq2419x->chg_ridata->constraints.valid_ops_mask =
REGULATOR_CHANGE_MODE |
REGULATOR_CHANGE_STATUS |
REGULATOR_CHANGE_CURRENT;
rconfig.dev = bq2419x->dev;
rconfig.of_node = bq2419x->chg_np;
rconfig.init_data = bq2419x->chg_ridata;
rconfig.driver_data = bq2419x;
bq2419x->chg_rdev = devm_regulator_register(bq2419x->dev,
&bq2419x->chg_reg_desc, &rconfig);
if (IS_ERR(bq2419x->chg_rdev)) {
ret = PTR_ERR(bq2419x->chg_rdev);
dev_err(bq2419x->dev,
"vbus-charger regulator register failed %d\n", ret);
}
return ret;
}
static int bq2419x_init_vbus_regulator(struct bq2419x_chip *bq2419x,
struct bq2419x_platform_data *pdata)
{
int ret = 0;
struct regulator_config rconfig = { };
if (!pdata->vbus_pdata) {
dev_err(bq2419x->dev, "No vbus platform data\n");
return 0;
}
bq2419x->gpio_otg_iusb = pdata->vbus_pdata->gpio_otg_iusb;
bq2419x->vbus_reg_desc = bq2419x_vbus_reg_desc;
bq2419x->vbus_ridata = pdata->vbus_pdata->ridata;
bq2419x->vbus_ridata->constraints.valid_modes_mask =
REGULATOR_MODE_NORMAL |
REGULATOR_MODE_STANDBY;
bq2419x->vbus_ridata->constraints.valid_ops_mask =
REGULATOR_CHANGE_MODE |
REGULATOR_CHANGE_STATUS |
REGULATOR_CHANGE_VOLTAGE;
if (gpio_is_valid(bq2419x->gpio_otg_iusb)) {
ret = gpio_request_one(bq2419x->gpio_otg_iusb,
GPIOF_OUT_INIT_HIGH, dev_name(bq2419x->dev));
if (ret < 0) {
dev_err(bq2419x->dev, "gpio request failed %d\n", ret);
return ret;
}
}
/* Register the regulators */
rconfig.dev = bq2419x->dev;
rconfig.of_node = bq2419x->vbus_np;
rconfig.init_data = bq2419x->vbus_ridata;
rconfig.driver_data = bq2419x;
bq2419x->vbus_rdev = devm_regulator_register(bq2419x->dev,
&bq2419x->vbus_reg_desc, &rconfig);
if (IS_ERR(bq2419x->vbus_rdev)) {
ret = PTR_ERR(bq2419x->vbus_rdev);
dev_err(bq2419x->dev,
"VBUS regulator register failed %d\n", ret);
goto scrub;
}
/* Disable the VBUS regulator and enable charging */
ret = bq2419x_charger_enable(bq2419x);
if (ret < 0) {
dev_err(bq2419x->dev, "Charging enable failed %d", ret);
goto scrub;
}
return ret;
scrub:
if (gpio_is_valid(bq2419x->gpio_otg_iusb))
gpio_free(bq2419x->gpio_otg_iusb);
return ret;
}
#ifdef CONFIG_DEBUG_FS
#include <linux/debugfs.h>
#include <linux/seq_file.h>
static struct dentry *debugfs_root;
static ssize_t bq2419x_show_suspend_state(struct file *file,
char __user *user_buf, size_t count, loff_t *ppos)
{
struct i2c_client *client = file->private_data;
struct bq2419x_chip *bq2419x = i2c_get_clientdata(client);
char buf[64] = { 0, };
ssize_t ret = 0;
if (bq2419x->wake_lock_released ||
(bq2419x->chg_status == BATTERY_CHARGING_DONE) ||
(bq2419x->in_current_limit <= 500))
ret = snprintf(buf, sizeof(buf), "Wake lock disabled\n");
else if (!bq2419x->wake_lock_released ||
(bq2419x->in_current_limit > 500))
ret = snprintf(buf, sizeof(buf), "Wake lock enabled\n");
return simple_read_from_buffer(user_buf, count, ppos, buf, ret);
}
static ssize_t bq2419x_enable_suspend_on_charging(struct file *file,
const char __user *user_buf, size_t count, loff_t *ppos)
{
struct i2c_client *client = file->private_data;
struct bq2419x_chip *bq2419x = i2c_get_clientdata(client);
char buf[64] = { 0, };
ssize_t buf_size;
bool enabled;
int ret;
if (!bq2419x->cable_connected ||
(bq2419x->chg_status == BATTERY_CHARGING_DONE))
return -EINVAL;
if (!bq2419x->disable_suspend_during_charging)
return -EINVAL;
buf_size = min(count, (sizeof(buf)-1));
if (copy_from_user(buf, user_buf, buf_size))
return -EFAULT;
if ((*buf == 'E') || (*buf == 'e'))
enabled = true;
else if ((*buf == 'D') || (*buf == 'd'))
enabled = false;
else
return -EINVAL;
if (enabled && !bq2419x->wake_lock_released) {
if (bq2419x->in_current_limit == 500)
return -EINVAL;
ret = bq2419x_configure_charging_current(bq2419x, 500);
if (ret < 0) {
dev_err(bq2419x->dev,
"Charging Current config faild: %d\n", ret);
return ret;
}
battery_charger_release_wake_lock(bq2419x->bc_dev);
bq2419x->wake_lock_released = true;
} else if (!enabled && bq2419x->wake_lock_released) {
bq2419x->wake_lock_released = false;
ret = bq2419x_configure_charging_current(bq2419x,
bq2419x->last_charging_current/1000);
if (ret < 0) {
dev_err(bq2419x->dev,
"Charging Current config faild: %d\n", ret);
return ret;
}
battery_charger_acquire_wake_lock(bq2419x->bc_dev);
}
return count;
}
static const struct file_operations bq2419x_debug_fops = {
.open = simple_open,
.write = bq2419x_enable_suspend_on_charging,
.read = bq2419x_show_suspend_state,
};
static int bq2419x_debugfs_init(struct i2c_client *client)
{
debugfs_root = debugfs_create_dir("battery_charger", NULL);
if (!debugfs_root)
pr_warn("bq2419x: Failed to create debugfs directory\n");
debugfs_create_file("allow_suspend_on_charging", S_IRUGO | S_IWUSR,
debugfs_root, (void *)client, &bq2419x_debug_fops);
return 0;
}
#else
static int bq2419x_debugfs_init(struct i2c_client *client)
{
return 0;
}
#endif
static int bq2419x_show_chip_version(struct bq2419x_chip *bq2419x)
{
int ret;
unsigned int val;
ret = regmap_read(bq2419x->regmap, BQ2419X_REVISION_REG, &val);
if (ret < 0) {
dev_err(bq2419x->dev, "REVISION_REG read failed: %d\n", ret);
return ret;
}
if ((val & BQ2419X_IC_VER_MASK) == BQ24190_IC_VER)
dev_info(bq2419x->dev, "chip type BQ24190 detected\n");
else if ((val & BQ2419X_IC_VER_MASK) == BQ24192_IC_VER)
dev_info(bq2419x->dev, "chip type BQ2419X/3 detected\n");
else if ((val & BQ2419X_IC_VER_MASK) == BQ24192i_IC_VER)
dev_info(bq2419x->dev, "chip type BQ2419Xi detected\n");
return 0;
}
static ssize_t bq2419x_show_input_charging_current(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct bq2419x_chip *bq2419x = i2c_get_clientdata(client);
unsigned int reg_val;
int ret;
mutex_lock(&bq2419x->mutex);
if (bq2419x->shutdown_complete) {
mutex_unlock(&bq2419x->mutex);
return -EIO;
}
ret = regmap_read(bq2419x->regmap, BQ2419X_INPUT_SRC_REG, &reg_val);
mutex_unlock(&bq2419x->mutex);
if (ret < 0) {
dev_err(bq2419x->dev, "INPUT_SRC read failed: %d\n", ret);
return ret;
}
ret = iinlim[BQ2419x_CONFIG_MASK & reg_val];
return snprintf(buf, MAX_STR_PRINT, "%d mA\n", ret);
}
static ssize_t bq2419x_set_input_charging_current(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct bq2419x_chip *bq2419x = i2c_get_clientdata(client);
int ret;
int in_current_limit;
char *p = (char *)buf;
mutex_lock(&bq2419x->mutex);
if (bq2419x->shutdown_complete) {
mutex_unlock(&bq2419x->mutex);
return -EIO;
}
in_current_limit = memparse(p, &p);
ret = bq2419x_configure_charging_current(bq2419x, in_current_limit);
mutex_unlock(&bq2419x->mutex);
if (ret < 0) {
dev_err(dev, "Current %d mA configuration faild: %d\n",
in_current_limit, ret);
return ret;
}
return count;
}
static ssize_t bq2419x_show_charging_state(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct bq2419x_chip *bq2419x = i2c_get_clientdata(client);
unsigned int reg_val;
int ret;
mutex_lock(&bq2419x->mutex);
if (bq2419x->shutdown_complete) {
mutex_unlock(&bq2419x->mutex);
return -EIO;
}
ret = regmap_read(bq2419x->regmap, BQ2419X_PWR_ON_REG, &reg_val);
mutex_unlock(&bq2419x->mutex);
if (ret < 0) {
dev_err(dev, "BQ2419X_PWR_ON register read failed: %d\n", ret);
return ret;
}
if ((reg_val & BQ2419X_ENABLE_CHARGE_MASK) == BQ2419X_ENABLE_CHARGE)
return snprintf(buf, MAX_STR_PRINT, "enabled\n");
else
return snprintf(buf, MAX_STR_PRINT, "disabled\n");
}
static ssize_t bq2419x_set_charging_state(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct bq2419x_chip *bq2419x = i2c_get_clientdata(client);
bool enabled;
int ret;
if ((*buf == 'E') || (*buf == 'e'))
enabled = true;
else if ((*buf == 'D') || (*buf == 'd'))
enabled = false;
else
return -EINVAL;
mutex_lock(&bq2419x->mutex);
if (bq2419x->shutdown_complete) {
mutex_unlock(&bq2419x->mutex);
return -EIO;
}
if (enabled)
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_PWR_ON_REG,
BQ2419X_ENABLE_CHARGE_MASK, BQ2419X_ENABLE_CHARGE);
else
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_PWR_ON_REG,
BQ2419X_ENABLE_CHARGE_MASK, BQ2419X_DISABLE_CHARGE);
mutex_unlock(&bq2419x->mutex);
if (ret < 0) {
dev_err(bq2419x->dev, "register update failed, %d\n", ret);
return ret;
}
return count;
}
static ssize_t bq2419x_show_input_cable_state(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct bq2419x_chip *bq2419x = i2c_get_clientdata(client);
unsigned int reg_val;
int ret;
mutex_lock(&bq2419x->mutex);
if (bq2419x->shutdown_complete) {
mutex_unlock(&bq2419x->mutex);
return -EIO;
}
ret = regmap_read(bq2419x->regmap, BQ2419X_INPUT_SRC_REG, &reg_val);
mutex_unlock(&bq2419x->mutex);
if (ret < 0) {
dev_err(dev, "BQ2419X_PWR_ON register read failed: %d\n", ret);
return ret;
}
if ((reg_val & BQ2419X_EN_HIZ) == BQ2419X_EN_HIZ)
return snprintf(buf, MAX_STR_PRINT, "Disconnected\n");
else
return snprintf(buf, MAX_STR_PRINT, "Connected\n");
}
static ssize_t bq2419x_set_input_cable_state(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct bq2419x_chip *bq2419x = i2c_get_clientdata(client);
bool connect;
int ret;
if ((*buf == 'C') || (*buf == 'c'))
connect = true;
else if ((*buf == 'D') || (*buf == 'd'))
connect = false;
else
return -EINVAL;
mutex_lock(&bq2419x->mutex);
if (bq2419x->shutdown_complete) {
mutex_unlock(&bq2419x->mutex);
return -EIO;
}
if (connect) {
bq2419x->emulate_input_disconnected = false;
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_INPUT_SRC_REG,
BQ2419X_EN_HIZ, 0);
} else {
bq2419x->emulate_input_disconnected = true;
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_INPUT_SRC_REG,
BQ2419X_EN_HIZ, BQ2419X_EN_HIZ);
}
mutex_unlock(&bq2419x->mutex);
if (ret < 0) {
dev_err(bq2419x->dev, "register update failed, %d\n", ret);
return ret;
}
if (connect)
dev_info(bq2419x->dev,
"Emulation of charger cable disconnect disabled\n");
else
dev_info(bq2419x->dev,
"Emulated as charger cable Disconnected\n");
return count;
}
static ssize_t bq2419x_show_output_charging_current(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct bq2419x_chip *bq2419x = i2c_get_clientdata(client);
int ret;
unsigned int data;
mutex_lock(&bq2419x->mutex);
if (bq2419x->shutdown_complete) {
mutex_unlock(&bq2419x->mutex);
return -EIO;
}
ret = regmap_read(bq2419x->regmap, BQ2419X_CHRG_CTRL_REG, &data);
mutex_unlock(&bq2419x->mutex);
if (ret < 0) {
dev_err(bq2419x->dev, "CHRG_CTRL read failed %d", ret);
return ret;
}
data >>= 2;
data = data * 64 + BQ2419X_CHARGE_ICHG_OFFSET;
return snprintf(buf, MAX_STR_PRINT, "%u mA\n", data);
}
static ssize_t bq2419x_set_output_charging_current(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct bq2419x_chip *bq2419x = i2c_get_clientdata(client);
int curr_val, ret;
int ichg;
if (kstrtouint(buf, 0, &curr_val)) {
dev_err(dev, "\nfile: %s, line=%d return %s()",
__FILE__, __LINE__, __func__);
return -EINVAL;
}
mutex_lock(&bq2419x->mutex);
if (bq2419x->shutdown_complete) {
mutex_unlock(&bq2419x->mutex);
return -EIO;
}
ichg = bq2419x_val_to_reg(curr_val, BQ2419X_CHARGE_ICHG_OFFSET,
64, 6, 0);
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_CHRG_CTRL_REG,
BQ2419X_CHRG_CTRL_ICHG_MASK, ichg << 2);
mutex_unlock(&bq2419x->mutex);
return count;
}
static ssize_t bq2419x_show_output_charging_current_values(struct device *dev,
struct device_attribute *attr, char *buf)
{
int i, ret = 0;
for (i = 0; i <= 63; i++)
ret += snprintf(buf + strlen(buf), MAX_STR_PRINT,
"%d mA\n", i * 64 + BQ2419X_CHARGE_ICHG_OFFSET);
return ret;
}
static DEVICE_ATTR(output_charging_current, (S_IRUGO | (S_IWUSR | S_IWGRP)),
bq2419x_show_output_charging_current,
bq2419x_set_output_charging_current);
static DEVICE_ATTR(output_current_allowed_values, S_IRUGO,
bq2419x_show_output_charging_current_values, NULL);
static DEVICE_ATTR(input_charging_current_mA, (S_IRUGO | (S_IWUSR | S_IWGRP)),
bq2419x_show_input_charging_current,
bq2419x_set_input_charging_current);
static DEVICE_ATTR(charging_state, (S_IRUGO | (S_IWUSR | S_IWGRP)),
bq2419x_show_charging_state, bq2419x_set_charging_state);
static DEVICE_ATTR(input_cable_state, (S_IRUGO | (S_IWUSR | S_IWGRP)),
bq2419x_show_input_cable_state, bq2419x_set_input_cable_state);
static struct attribute *bq2419x_attributes[] = {
&dev_attr_output_charging_current.attr,
&dev_attr_output_current_allowed_values.attr,
&dev_attr_input_charging_current_mA.attr,
&dev_attr_charging_state.attr,
&dev_attr_input_cable_state.attr,
NULL
};
static const struct attribute_group bq2419x_attr_group = {
.attrs = bq2419x_attributes,
};
static int bq2419x_get_input_current_limit(struct battery_charger_dev *bc_dev)
{
struct bq2419x_chip *bq2419x = battery_charger_get_drvdata(bc_dev);
if (!bq2419x->cable_connected)
return 0;
return bq2419x->in_current_limit;
}
static int bq2419x_charger_termination_configure(
struct battery_charger_dev *bc_dev, int full_charge_state)
{
struct bq2419x_chip *bq2419x = battery_charger_get_drvdata(bc_dev);
int ret;
dev_err(bq2419x->dev, "Configure charge termination: %d\n",
full_charge_state);
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_TIME_CTRL_REG,
BQ2419x_EN_CHARGE_TERM, (full_charge_state ?
BQ2419x_EN_CHARGE_TERM : 0));
if (ret < 0) {
dev_err(bq2419x->dev, "TIME_CTRL update failed: %d\n", ret);
return ret;
}
return 0;
}
static int bq2419x_charger_get_status(struct battery_charger_dev *bc_dev)
{
struct bq2419x_chip *bq2419x = battery_charger_get_drvdata(bc_dev);
return bq2419x->chg_status;
}
static int bq2419x_charger_thermal_configure(
struct battery_charger_dev *bc_dev,
int temp, bool enable_charger, bool enable_charg_half_current,
int battery_voltage)
{
struct bq2419x_chip *bq2419x = battery_charger_get_drvdata(bc_dev);
struct bq2419x_charger_platform_data *chg_pdata;
int fast_charge_current = 0;
u32 charge_voltage_limit = 0;
int ichg;
int ret;
int i;
int curr_ichg, vreg;
if (bq2419x->shutdown_complete)
return 0;
chg_pdata = bq2419x->charger_pdata;
if (!bq2419x->cable_connected || !chg_pdata->n_temp_profile)
return 0;
if (bq2419x->last_temp == temp)
return 0;
bq2419x->last_temp = temp;
dev_info(bq2419x->dev, "Battery temp %d\n", temp);
if ((temp > BQ2419x_TEMP_H_CHG_DISABLE ||
temp < BQ2419x_TEMP_L_CHG_DISABLE) &&
!bq2419x->thermal_chg_disable) {
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_PWR_ON_REG,
BQ2419X_ENABLE_CHARGE_MASK,
BQ2419X_DISABLE_CHARGE);
if (ret < 0) {
dev_err(bq2419x->dev, "REG update failed, %d\n", ret);
return ret;
}
dev_info(bq2419x->dev, "Thermal: Charging disabled\n");
bq2419x->thermal_chg_disable = true;
}
if ((temp <= BQ2419x_TEMP_H_CHG_DISABLE &&
temp >= BQ2419x_TEMP_L_CHG_DISABLE) &&
bq2419x->thermal_chg_disable) {
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_PWR_ON_REG,
BQ2419X_ENABLE_CHARGE_MASK,
BQ2419X_ENABLE_CHARGE);
if (ret < 0) {
dev_err(bq2419x->dev, "REG update failed, %d\n", ret);
return ret;
}
dev_info(bq2419x->dev, "Thermal: Charging enabled\n");
bq2419x->thermal_chg_disable = false;
}
for (i = 0; i < chg_pdata->n_temp_profile; ++i) {
if (temp <= chg_pdata->temp_range[i]) {
fast_charge_current = chg_pdata->chg_current_limit[i];
if (chg_pdata->chg_thermal_voltage_limit)
charge_voltage_limit =
chg_pdata->chg_thermal_voltage_limit[i];
break;
}
}
if (!fast_charge_current || !temp) {
dev_info(bq2419x->dev, "Disable charging done by HW\n");
return 0;
}
/* Fast charger become 50% when temp is at < 10 degC */
if (temp <= 10)
fast_charge_current *= 2;
curr_ichg = bq2419x->chg_current_control.val >> 2;
ichg = bq2419x_val_to_reg(fast_charge_current,
BQ2419X_CHARGE_ICHG_OFFSET, 64, 6, 0);
if (curr_ichg == ichg)
return 0;
bq2419x->chg_current_control.val = ichg << 2;
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_CHRG_CTRL_REG,
BQ2419X_CHRG_CTRL_ICHG_MASK, ichg << 2);
if (ret < 0) {
dev_err(bq2419x->dev, "CHRG_CTRL_REG update failed %d\n", ret);
return ret;
}
if (!charge_voltage_limit)
return 0;
/* Charge voltage limit */
vreg = bq2419x_val_to_reg(charge_voltage_limit,
BQ2419X_CHARGE_VOLTAGE_OFFSET, 16, 6, 1);
bq2419x->chg_voltage_control.mask = BQ2419X_CHG_VOLT_LIMIT_MASK;
bq2419x->chg_voltage_control.val = vreg << 2;
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_VOLT_CTRL_REG,
bq2419x->chg_voltage_control.mask,
bq2419x->chg_voltage_control.val);
if (ret < 0) {
dev_err(bq2419x->dev, "VOLT_CTRL_REG update failed %d\n", ret);
return ret;
}
return 0;
}
static struct battery_charging_ops bq2419x_charger_bci_ops = {
.get_charging_status = bq2419x_charger_get_status,
.charge_term_configure = bq2419x_charger_termination_configure,
.get_input_current_limit = bq2419x_get_input_current_limit,
.input_voltage_configure = bq2419x_charger_input_voltage_configure,
.thermal_configure = bq2419x_charger_thermal_configure,
};
static struct battery_charger_info bq2419x_charger_bci = {
.cell_id = 0,
.bc_ops = &bq2419x_charger_bci_ops,
};
static struct bq2419x_platform_data *bq2419x_dt_parse(struct i2c_client *client,
struct device_node **chg_np, struct device_node **vbus_np)
{
struct device_node *np = client->dev.of_node;
struct bq2419x_platform_data *pdata;
struct device_node *batt_reg_node;
struct device_node *vbus_reg_node;
int ret;
pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return ERR_PTR(-ENOMEM);
batt_reg_node = of_find_node_by_name(np, "charger");
if (batt_reg_node) {
int auto_rechg_power_on_time;
int count;
int soc_range_len, inut_volt_lim_len = 0;
int temp_range_len, chg_current_lim_len, chg_voltage_lim_len;
int temp_polling_time;
int wdt_timeout;
struct bq2419x_charger_platform_data *chg_pdata;
struct bq2419x_charger_platform_data *bcharger_pdata;
u32 pval;
if (!of_device_is_available(batt_reg_node)) {
dev_info(&client->dev,
"charger node status is disabled\n");
goto vbus_node;
}
pdata->bcharger_pdata = devm_kzalloc(&client->dev,
sizeof(*(pdata->bcharger_pdata)), GFP_KERNEL);
if (!pdata->bcharger_pdata)
return ERR_PTR(-ENOMEM);
bcharger_pdata = pdata->bcharger_pdata;
chg_pdata = pdata->bcharger_pdata;
chg_pdata->ridata = of_get_regulator_init_data(&client->dev,
batt_reg_node, &bq2419x_chg_reg_desc);
if (!chg_pdata->ridata)
return ERR_PTR(-EINVAL);
ret = of_property_read_u32(batt_reg_node,
"ti,input-voltage-limit-millivolt", &pval);
if (ret < 0)
ret = of_property_read_u32(batt_reg_node,
"ti,input-voltage-limit-mv", &pval);
if (!ret)
bcharger_pdata->input_voltage_limit_mV = pval;
ret = of_property_read_u32(batt_reg_node,
"ti,fast-charge-current-limit-milliamp", &pval);
if (ret < 0)
ret = of_property_read_u32(batt_reg_node,
"ti,fast-charge-current-limit-ma", &pval);
if (!ret)
bcharger_pdata->fast_charge_current_limit_mA =
pval;
ret = of_property_read_u32(batt_reg_node,
"ti,pre-charge-current-limit-milliamp", &pval);
if (ret < 0)
ret = of_property_read_u32(batt_reg_node,
"ti,pre-charge-current-limit-ma", &pval);
if (!ret)
bcharger_pdata->pre_charge_current_limit_mA = pval;
ret = of_property_read_u32(batt_reg_node,
"ti,charge-term-current-limit-milliamp", &pval);
if (ret < 0)
ret = of_property_read_u32(batt_reg_node,
"ti,charge-term-current-limit-ma", &pval);
if (!ret)
bcharger_pdata->termination_current_limit_mA = pval;
ret = of_property_read_u32(batt_reg_node,
"ti,ir-comp-resister-ohm", &pval);
if (!ret)
bcharger_pdata->ir_compensation_resister_ohm = pval;
ret = of_property_read_u32(batt_reg_node,
"ti,ir-comp-voltage-millivolt", &pval);
if (!ret)
bcharger_pdata->ir_compensation_voltage_mV = pval;
ret = of_property_read_u32(batt_reg_node,
"ti,thermal-regulation-threshold-degc", &pval);
if (ret < 0)
ret = of_property_read_u32(batt_reg_node,
"ti,thermal-reg-threshold-degc", &pval);
if (!ret)
bcharger_pdata->thermal_regulation_threshold_degC =
pval;
ret = of_property_read_u32(batt_reg_node,
"ti,charge-voltage-limit-millivolt", &pval);
if (ret < 0)
ret = of_property_read_u32(batt_reg_node,
"ti,charge-voltage-limit-mv", &pval);
if (!ret)
pdata->bcharger_pdata->charge_voltage_limit_mV = pval;
pdata->bcharger_pdata->disable_suspend_during_charging =
of_property_read_bool(batt_reg_node,
"ti,disbale-suspend-during-charging");
if (!pdata->bcharger_pdata->disable_suspend_during_charging)
pdata->bcharger_pdata->disable_suspend_during_charging =
of_property_read_bool(batt_reg_node,
"ti,disable-suspend-on-charging");
ret = of_property_read_u32(batt_reg_node,
"ti,auto-rechg-power-on-time",
&auto_rechg_power_on_time);
if (!ret)
pdata->bcharger_pdata->auto_rechg_power_on_time =
auto_rechg_power_on_time;
else
pdata->bcharger_pdata->auto_rechg_power_on_time = 25;
ret = of_property_read_u32(batt_reg_node,
"ti,watchdog-timeout", &wdt_timeout);
if (!ret)
pdata->bcharger_pdata->wdt_timeout = wdt_timeout;
count = of_property_count_u32_elems(batt_reg_node,
"ti,soc-range");
soc_range_len = (count > 0) ? count : 0;
if (soc_range_len) {
chg_pdata->n_soc_profile = soc_range_len;
chg_pdata->soc_range = devm_kzalloc(&client->dev,
sizeof(u32) * soc_range_len, GFP_KERNEL);
if (!chg_pdata->soc_range)
return ERR_PTR(-ENOMEM);
ret = of_property_read_u32_array(batt_reg_node,
"ti,soc-range",
chg_pdata->soc_range, soc_range_len);
if (ret < 0)
return ERR_PTR(ret);
count = of_property_count_u32_elems(batt_reg_node,
"ti,input-voltage-soc-limit");
inut_volt_lim_len = (count > 0) ? count : 0;
}
if (inut_volt_lim_len) {
chg_pdata->input_voltage_soc_limit =
devm_kzalloc(&client->dev,
sizeof(u32) * inut_volt_lim_len,
GFP_KERNEL);
if (!chg_pdata->input_voltage_soc_limit)
return ERR_PTR(-ENOMEM);
ret = of_property_read_u32_array(batt_reg_node,
"ti,input-voltage-soc-limit",
chg_pdata->input_voltage_soc_limit,
inut_volt_lim_len);
if (ret < 0)
return ERR_PTR(ret);
}
ret = of_property_read_u32(batt_reg_node,
"ti,temp-polling-time-sec", &temp_polling_time);
if (!ret)
bcharger_pdata->temp_polling_time_sec =
temp_polling_time;
chg_pdata->tz_name = of_get_property(batt_reg_node,
"ti,thermal-zone", NULL);
count = of_property_count_u32_elems(batt_reg_node,
"ti,temp-range");
temp_range_len = (count > 0) ? count : 0;
count = of_property_count_u32_elems(batt_reg_node,
"ti,charge-current-limit");
if (count <= 0)
count = of_property_count_u32_elems(batt_reg_node,
"ti,charge-thermal-current-limit");
chg_current_lim_len = (count > 0) ? count : 0;
count = of_property_count_u32_elems(batt_reg_node,
"ti,charge-thermal-voltage-limit");
chg_voltage_lim_len = (count > 0) ? count : 0;
if (!temp_range_len)
goto vbus_node;
if (temp_range_len != chg_current_lim_len) {
dev_info(&client->dev,
"current thermal profile is not correct\n");
goto vbus_node;
}
if (chg_voltage_lim_len &&
(temp_range_len != chg_voltage_lim_len)) {
dev_info(&client->dev,
"voltage thermal profile is not correct\n");
goto vbus_node;
}
chg_pdata->temp_range = devm_kzalloc(&client->dev,
sizeof(u32) * temp_range_len, GFP_KERNEL);
if (!chg_pdata->temp_range)
return ERR_PTR(-ENOMEM);
ret = of_property_read_u32_array(batt_reg_node, "ti,temp-range",
chg_pdata->temp_range, temp_range_len);
if (ret < 0)
return ERR_PTR(ret);
chg_pdata->chg_current_limit = devm_kzalloc(&client->dev,
sizeof(u32) * temp_range_len, GFP_KERNEL);
if (!chg_pdata->chg_current_limit)
return ERR_PTR(-ENOMEM);
ret = of_property_read_u32_array(batt_reg_node,
"ti,charge-current-limit",
chg_pdata->chg_current_limit,
temp_range_len);
if (ret < 0)
ret = of_property_read_u32_array(batt_reg_node,
"ti,charge-thermal-current-limit",
chg_pdata->chg_current_limit,
temp_range_len);
if (ret < 0)
return ERR_PTR(ret);
if (!chg_voltage_lim_len)
goto skip_thermal_volt_profle;
chg_pdata->chg_thermal_voltage_limit =
devm_kzalloc(&client->dev,
sizeof(u32) * temp_range_len,
GFP_KERNEL);
if (!chg_pdata->chg_thermal_voltage_limit)
return ERR_PTR(-ENOMEM);
ret = of_property_read_u32_array(batt_reg_node,
"ti,charge-thermal-voltage-limit",
chg_pdata->chg_thermal_voltage_limit,
temp_range_len);
if (ret < 0)
return ERR_PTR(ret);
skip_thermal_volt_profle:
chg_pdata->n_temp_profile = temp_range_len;
}
vbus_node:
vbus_reg_node = of_find_node_by_name(np, "vbus");
if (vbus_reg_node) {
pdata->vbus_pdata = devm_kzalloc(&client->dev,
sizeof(*(pdata->vbus_pdata)), GFP_KERNEL);
if (!pdata->vbus_pdata)
return ERR_PTR(-ENOMEM);
pdata->vbus_pdata->ridata = of_get_regulator_init_data(
&client->dev, vbus_reg_node,
&bq2419x_vbus_reg_desc);
if (!pdata->vbus_pdata->ridata)
return ERR_PTR(-EINVAL);
pdata->vbus_pdata->gpio_otg_iusb =
of_get_named_gpio(vbus_reg_node,
"ti,otg-iusb-gpio", 0);
}
*chg_np = batt_reg_node;
*vbus_np = vbus_reg_node;
return pdata;
}
static int bq2419x_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct bq2419x_chip *bq2419x;
struct bq2419x_platform_data *pdata = NULL;
struct device_node *chg_np = NULL;
struct device_node *vbus_np = NULL;
int ret = 0;
int val = 0;
if (client->dev.platform_data)
pdata = client->dev.platform_data;
if (!pdata && client->dev.of_node) {
pdata = bq2419x_dt_parse(client, &chg_np, &vbus_np);
if (IS_ERR(pdata)) {
ret = PTR_ERR(pdata);
dev_err(&client->dev, "Parsing of node failed, %d\n",
ret);
return ret;
}
}
if (!pdata) {
dev_err(&client->dev, "No Platform data");
return -EINVAL;
}
bq2419x = devm_kzalloc(&client->dev, sizeof(*bq2419x), GFP_KERNEL);
if (!bq2419x)
return -ENOMEM;
bq2419x->charger_pdata = pdata->bcharger_pdata;
bq2419x->vbus_pdata = pdata->vbus_pdata;
bq2419x->ext_name = pdata->ext_name;
bq2419x->chg_np = chg_np;
bq2419x->vbus_np = vbus_np;
bq2419x->regmap = devm_regmap_init_i2c(client, &bq2419x_regmap_config);
if (IS_ERR(bq2419x->regmap)) {
ret = PTR_ERR(bq2419x->regmap);
dev_err(&client->dev, "regmap init failed with err %d\n", ret);
return ret;
}
bq2419x->dev = &client->dev;
i2c_set_clientdata(client, bq2419x);
bq2419x->irq = client->irq;
mutex_init(&bq2419x->otg_mutex);
bq2419x->is_otg_connected = 0;
bq2419x->shutdown_complete = 0;
bq2419x->wake_lock_released = false;
bq2419x->charging_disabled_on_suspend = 0;
ret = bq2419x_show_chip_version(bq2419x);
if (ret < 0) {
dev_err(&client->dev, "version read failed %d\n", ret);
return ret;
}
ret = sysfs_create_group(&client->dev.kobj, &bq2419x_attr_group);
if (ret < 0) {
dev_err(&client->dev, "sysfs create failed %d\n", ret);
return ret;
}
bq2419x_debugfs_init(client);
bq2419x->edev.supported_cable = bq2419x_extcon_cable;
bq2419x->edev.name = bq2419x->ext_name;
bq2419x->edev.dev.parent = bq2419x->dev;
ret = devm_extcon_dev_register(bq2419x->dev, &bq2419x->edev);
if (ret < 0) {
dev_err(bq2419x->dev, "failed to register extcon device\n");
return ret;
}
ret = regmap_read(bq2419x->regmap, BQ2419X_SYS_STAT_REG, &val);
if (ret < 0) {
dev_err(bq2419x->dev, "SYS_STAT_REG rd failed %d\n", ret);
return ret;
}
ret = bq2419x_extcon_cable_update(bq2419x, val);
mutex_init(&bq2419x->mutex);
if (!pdata->bcharger_pdata) {
dev_info(&client->dev, "No battery charger supported\n");
ret = bq2419x_watchdog_disable(bq2419x);
if (ret < 0) {
dev_err(bq2419x->dev, "WDT disable failed: %d\n", ret);
goto scrub_mutex;
}
/* disable safety timer */
ret = bq2419x_safetytimer_disable(bq2419x);
if (ret < 0) {
dev_err(bq2419x->dev,
"Safety timer disable failed: %d\n", ret);
goto scrub_mutex;
}
/* disable chrg and bat fault interrupt */
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_MISC_OPER_REG,
BQ2419x_CHRG_BAT_FAULT_MASK,
BQ2419x_CHRG_BAT_FAULT_DISABLE);
if (ret < 0)
dev_err(bq2419x->dev,
"Chrg and Bat fault interrupt disable failed %d\n",
ret);
ret = bq2419x_fault_clear_sts(bq2419x, NULL);
if (ret < 0) {
dev_err(bq2419x->dev, "fault clear status failed %d\n",
ret);
goto scrub_mutex;
}
goto skip_bcharger_init;
}
bq2419x->battery_presense = true;
bq2419x->disable_suspend_during_charging =
pdata->bcharger_pdata->disable_suspend_during_charging;
bq2419x->auto_rechg_power_on_time =
pdata->bcharger_pdata->auto_rechg_power_on_time;
bq2419x->wdt_time_sec = pdata->bcharger_pdata->wdt_timeout;
bq2419x_process_charger_plat_data(bq2419x, pdata->bcharger_pdata);
ret = bq2419x_charger_init(bq2419x);
if (ret < 0) {
dev_err(bq2419x->dev, "Charger init failed: %d\n", ret);
goto scrub_mutex;
}
ret = bq2419x_init_charger_regulator(bq2419x, pdata);
if (ret < 0) {
dev_err(&client->dev,
"Charger regualtor init failed %d\n", ret);
goto scrub_mutex;
}
bq2419x_charger_bci.polling_time_sec =
pdata->bcharger_pdata->temp_polling_time_sec;
bq2419x_charger_bci.tz_name = pdata->bcharger_pdata->tz_name;
bq2419x->bc_dev = battery_charger_register(bq2419x->dev,
&bq2419x_charger_bci, bq2419x);
if (IS_ERR(bq2419x->bc_dev)) {
ret = PTR_ERR(bq2419x->bc_dev);
dev_err(bq2419x->dev, "battery charger register failed: %d\n",
ret);
goto scrub_mutex;
}
ret = bq2419x_fault_clear_sts(bq2419x, NULL);
if (ret < 0) {
dev_err(bq2419x->dev, "fault clear status failed %d\n", ret);
goto scrub_wq;
}
INIT_DELAYED_WORK(&bq2419x->wdt_restart_wq, bq2419x_wdt_restart_wq);
skip_bcharger_init:
ret = devm_request_threaded_irq(bq2419x->dev, bq2419x->irq, NULL,
bq2419x_irq, IRQF_ONESHOT | IRQF_TRIGGER_FALLING,
dev_name(bq2419x->dev), bq2419x);
if (ret < 0) {
dev_warn(bq2419x->dev, "request IRQ %d fail, err = %d\n",
bq2419x->irq, ret);
dev_info(bq2419x->dev,
"Supporting bq driver without interrupt\n");
ret = 0;
}
device_set_wakeup_capable(bq2419x->dev, true);
device_wakeup_enable(bq2419x->dev);
ret = bq2419x_init_vbus_regulator(bq2419x, pdata);
if (ret < 0) {
dev_err(&client->dev, "VBUS regulator init failed %d\n", ret);
goto scrub_wq;
}
/* enable charging */
ret = bq2419x_charger_enable(bq2419x);
if (ret < 0)
goto scrub_wq;
if (bq2419x->battery_presense) {
bq2419x->thermal_init_retry = 10;
#ifdef CONFIG_THERMAL
INIT_DELAYED_WORK(&bq2419x->thermal_init_work,
bq2419x_thermal_init_work);
bq2419x_thermal_init_work(&bq2419x->thermal_init_work.work);
#endif
}
INIT_DELAYED_WORK(&bq2419x->otg_reset_work,
bq2419x_otg_reset_work_handler);
return 0;
scrub_wq:
if (pdata->bcharger_pdata)
battery_charger_unregister(bq2419x->bc_dev);
scrub_mutex:
extcon_dev_unregister(&bq2419x->edev);
mutex_destroy(&bq2419x->mutex);
mutex_destroy(&bq2419x->otg_mutex);
return ret;
}
static int bq2419x_remove(struct i2c_client *client)
{
struct bq2419x_chip *bq2419x = i2c_get_clientdata(client);
if (bq2419x->battery_presense)
battery_charger_unregister(bq2419x->bc_dev);
if (bq2419x->is_otg_connected) {
cancel_delayed_work_sync(&bq2419x->otg_reset_work);
bq2419x_vbus_disable(bq2419x->vbus_rdev);
}
mutex_destroy(&bq2419x->mutex);
mutex_destroy(&bq2419x->otg_mutex);
cancel_delayed_work_sync(&bq2419x->thermal_init_work);
return 0;
}
static void bq2419x_shutdown(struct i2c_client *client)
{
struct bq2419x_chip *bq2419x = i2c_get_clientdata(client);
struct device *dev = &client->dev;
int ret;
int next_poweron_time = 0;
mutex_lock(&bq2419x->mutex);
bq2419x->shutdown_complete = 1;
mutex_unlock(&bq2419x->mutex);
if (bq2419x->is_otg_connected) {
cancel_delayed_work_sync(&bq2419x->otg_reset_work);
bq2419x_vbus_disable(bq2419x->vbus_rdev);
}
if (!bq2419x->battery_presense)
return;
if (!bq2419x->cable_connected)
goto end;
/* Clear JEITA_VSET bit if cable connected while device off */
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_MISC_OPER_REG,
BQ2419X_JEITA_VSET_MASK, 0);
if (ret < 0)
dev_err(bq2419x->dev, "JEITA_VSET update failed: %d\n", ret);
battery_charger_thermal_stop_monitoring(bq2419x->bc_dev);
if (bq2419x->chg_status == BATTERY_CHARGING_DONE) {
dev_info(bq2419x->dev, "Battery charging done\n");
goto end;
}
if (bq2419x->in_current_limit <= 500)
dev_info(bq2419x->dev, "Battery charging with 500mA\n");
else {
dev_info(bq2419x->dev, "Battery charging with high current\n");
next_poweron_time = bq2419x->auto_rechg_power_on_time;
}
if (next_poweron_time) {
ret = battery_charging_system_reset_after(bq2419x->bc_dev,
next_poweron_time);
if (ret < 0)
dev_err(dev,
"System poweron after %d config failed %d\n",
next_poweron_time, ret);
}
end:
if (next_poweron_time)
dev_info(dev, "System-charger will power-ON after %d sec\n",
next_poweron_time);
else
dev_info(bq2419x->dev, "System-charger will not power-ON\n");
battery_charging_system_power_on_usb_event(bq2419x->bc_dev);
cancel_delayed_work_sync(&bq2419x->thermal_init_work);
}
#ifdef CONFIG_PM_SLEEP
static int bq2419x_suspend(struct device *dev)
{
struct bq2419x_chip *bq2419x = dev_get_drvdata(dev);
int ret = 0;
int battery_soc = 0;
if (device_may_wakeup(bq2419x->dev) && (bq2419x->irq > 0))
enable_irq_wake(bq2419x->irq);
if (!bq2419x->battery_presense)
return 0;
mutex_lock(&bq2419x->mutex);
if (bq2419x->is_otg_connected) {
ret = bq2419x_reset_wdt(bq2419x, "Suspend");
if (ret < 0)
dev_err(bq2419x->dev, "Reset WDT failed: %d\n", ret);
}
mutex_unlock(&bq2419x->mutex);
battery_soc = battery_gauge_get_battery_soc(bq2419x->bc_dev);
if (battery_soc > BQ2419X_PC_USB_LP0_THRESHOLD &&
(bq2419x->in_current_limit <= 500) &&
!bq2419x->is_otg_connected) {
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_PWR_ON_REG,
BQ2419X_ENABLE_CHARGE_MASK,
BQ2419X_DISABLE_CHARGE);
if (ret < 0)
dev_err(bq2419x->dev,
"REG update failed: err %d\n", ret);
else
bq2419x->charging_disabled_on_suspend = true;
}
if (!bq2419x->cable_connected)
goto end;
if (bq2419x->chg_status == BATTERY_CHARGING_DONE) {
dev_info(bq2419x->dev, "Battery charging done\n");
goto end;
}
if (bq2419x->in_current_limit <= 500) {
dev_info(bq2419x->dev, "Battery charging with 500mA\n");
ret = bq2419x_set_charging_current_suspend(bq2419x, 500);
if (ret < 0)
dev_err(bq2419x->dev,
"Config of charging failed: %d\n", ret);
if (battery_soc > BQ2419X_PC_USB_LP0_THRESHOLD &&
!bq2419x->is_otg_connected) {
ret = regmap_update_bits(bq2419x->regmap,
BQ2419X_PWR_ON_REG, BQ2419X_ENABLE_CHARGE_MASK,
BQ2419X_DISABLE_CHARGE);
if (ret < 0)
dev_err(bq2419x->dev,
"REG update failed: err %d\n", ret);
else
bq2419x->charging_disabled_on_suspend = true;
}
} else
dev_info(bq2419x->dev, "Battery charging with high current\n");
end:
return ret;
}
static int bq2419x_resume(struct device *dev)
{
int ret = 0;
struct bq2419x_chip *bq2419x = dev_get_drvdata(dev);
unsigned int val;
if (device_may_wakeup(bq2419x->dev) && (bq2419x->irq > 0))
disable_irq_wake(bq2419x->irq);
if (bq2419x->charging_disabled_on_suspend) {
bq2419x->charging_disabled_on_suspend = false;
ret = regmap_update_bits(bq2419x->regmap, BQ2419X_PWR_ON_REG,
BQ2419X_ENABLE_CHARGE_MASK,
BQ2419X_ENABLE_CHARGE);
if (ret < 0)
dev_err(bq2419x->dev,
"register update failed: err %d\n", ret);
}
ret = regmap_read(bq2419x->regmap, BQ2419X_SYS_STAT_REG, &val);
if (ret < 0) {
dev_err(bq2419x->dev, "SYS_STAT_REG read failed %d\n", ret);
return IRQ_HANDLED;
}
if ((val & BQ2419x_VBUS_PG_STAT) == BQ2419x_PG_VBUS_USB) {
extcon_set_cable_state_(&bq2419x->edev,
bq2419x_extcon_cable[0], true);
if (!bq2419x->cable_connected)
dev_info(bq2419x->dev, "USB is connected\n");
} else if ((val & BQ2419x_VBUS_PG_STAT) == BQ2419x_VBUS_UNKNOWN) {
extcon_set_cable_state_(&bq2419x->edev,
bq2419x_extcon_cable[0], false);
if (bq2419x->cable_connected)
dev_info(bq2419x->dev, "USB is disconnected\n");
}
if (!bq2419x->battery_presense)
return 0;
ret = bq2419x_fault_clear_sts(bq2419x, &val);
if (ret < 0) {
dev_err(bq2419x->dev, "fault clear status failed %d\n", ret);
return ret;
}
if (val & BQ2419x_FAULT_WATCHDOG_FAULT) {
bq_chg_err(bq2419x, "Watchdog Timer Expired\n");
ret = bq2419x_reconfigure_charger_param(bq2419x,
"WDT-EXP-RESUME");
if (ret < 0)
dev_err(bq2419x->dev, "BQ reconfig failed %d\n", ret);
}
return 0;
};
#endif
static const struct dev_pm_ops bq2419x_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(bq2419x_suspend, bq2419x_resume)
};
static const struct i2c_device_id bq2419x_id[] = {
{.name = "bq2419x",},
{},
};
MODULE_DEVICE_TABLE(i2c, bq2419x_id);
static struct i2c_driver bq2419x_i2c_driver = {
.driver = {
.name = "bq2419x",
.owner = THIS_MODULE,
.pm = &bq2419x_pm_ops,
},
.probe = bq2419x_probe,
.remove = bq2419x_remove,
.shutdown = bq2419x_shutdown,
.id_table = bq2419x_id,
};
static int __init bq2419x_module_init(void)
{
return i2c_add_driver(&bq2419x_i2c_driver);
}
subsys_initcall(bq2419x_module_init);
static void __exit bq2419x_cleanup(void)
{
i2c_del_driver(&bq2419x_i2c_driver);
}
module_exit(bq2419x_cleanup);
MODULE_DESCRIPTION("BQ24190/BQ24192/BQ24192i/BQ24193 battery charger driver");
MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
MODULE_AUTHOR("Syed Rafiuddin <srafiuddin@nvidia.com");
MODULE_LICENSE("GPL v2");
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